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The egg and larval stages of Nyctiphanes simplex , a euphausiid crustacean from California *
Author(s) -
BODEN BRIAN P.
Publication year - 1951
Publication title -
proceedings of the zoological society of london
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.915
H-Index - 96
eISSN - 1469-7998
pISSN - 0370-2774
DOI - 10.1111/j.1096-3642.1951.tb00752.x
Subject(s) - larva , biology , crustacean , stage (stratigraphy) , zoology , developmental stage , anatomy , ecology , paleontology , psychology , developmental psychology
SUMMARY. The female of Nyctiphanes simplex carries her eggs in an egg sac. The eggs hatch in the nauplius stage and remain in the egg sac throughout that stage. The larva emerges from the sac as a pseudo‐metanauplius and moults immediately into the metanauplius stage. This is followed by three calyptopis stages and the furcilia stages. There are probably nineteen types of furcilia larvae. Since six of these are numerically dominant, it is probable that the larvae “jump” stages in the furcilia series. The six dominant types are described as the six furcilia stages. A key to the furcilia stages is included.